Prerequisites:
Students understand the different types of forces and are able to describe their existence with respect to daily activities.
Learning Outcomes:
1. At the end of the lessons, students should be able to name the factors affecting Pressure.
2. State and apply the relationship P = F/A to relevant situations
ICT Tools:
1. Video clips to trigger thinking
2. Students' own exploration in groups of 4
3. Discussion forum in Wikispaces
4. Concept maps to link concepts and ideas from different students
5. Reflections in Wikispaces (Created by teacher)
Description of Activity:
Question
Show students the videoclip on the orange and girl on bed of nails.
Ask students the following questions but do not answer:
1. Why is it that we can push a thumbtack into the noticeboard but we can't push our finger?
2. Why is it that a sharp knife cuts better than a blunt knife?
3. What if we change the sharp knife into a different material?
Evidence
Break students into groups of 4, get each group to collect the following materials: 2 balloons, 1 single nail and 1 pre-made bed of nails.
Students are to inflate both balloons and press one each on the single nail and the bed of nails. One student in the group is to video-tape the whole process.
Explanation
Direct students to go to the discussion forum in Wikispaces to discuss on the following:
1. What are the possible factors affecting the balloon phenomenon?
2. Does the size of the balloon matter?
3. Summarize their ideas and propose a possible formula to calculate Pressure.
Teacher to join in their discussion forums and to direct them where necessary. Finally, explain the reasons behind the phenomenon and explain the formula P = F/A.
Connection
Students are already familiar with the concept of Forces and now they have learnt a new related concept on Pressure.
Get students to go to Webspiration and brainstorm in their groups of 4 to create a meaningful concept map linking their ideas in Forces and Pressure, with specific reference to daily examples, eg. Lady in high heels vs flats etc.
Teacher is to be invited to their concepts maps so as to track and assess their learning.
Communications
Students to type in their reflections in the Reflection section in Wikispaces on what they have learnt in this lessons. This includes what was useful to them, what problems did they face, what other skills do they think they need to be more competent for such lessons etc.
Invite students from other groups to comment on the group's discussion threads and reflections, in the form of a virtual gallery walk. This helps students to connect more ideas from other groups and also to explore more grounds.
Topic: Pressure
Prerequisites:
Students understand the different types of forces and are able to describe their existence with respect to daily activities.
Learning Outcomes:
1. At the end of the lessons, students should be able to name the factors affecting Pressure.
2. State and apply the relationship P = F/A to relevant situations
ICT Tools:
1. Video clips to trigger thinking
2. Students' own exploration in groups of 4
3. Discussion forum in Wikispaces
4. Concept maps to link concepts and ideas from different students
5. Reflections in Wikispaces (Created by teacher)
Description of Activity:
Question
Show students the videoclip on the orange and girl on bed of nails.
Ask students the following questions but do not answer:
1. Why is it that we can push a thumbtack into the noticeboard but we can't push our finger?
2. Why is it that a sharp knife cuts better than a blunt knife?
3. What if we change the sharp knife into a different material?
Evidence
Break students into groups of 4, get each group to collect the following materials: 2 balloons, 1 single nail and 1 pre-made bed of nails.
Students are to inflate both balloons and press one each on the single nail and the bed of nails. One student in the group is to video-tape the whole process.
Explanation
Direct students to go to the discussion forum in Wikispaces to discuss on the following:
1. What are the possible factors affecting the balloon phenomenon?
2. Does the size of the balloon matter?
3. Summarize their ideas and propose a possible formula to calculate Pressure.
Teacher to join in their discussion forums and to direct them where necessary. Finally, explain the reasons behind the phenomenon and explain the formula P = F/A.
Connection
Students are already familiar with the concept of Forces and now they have learnt a new related concept on Pressure.
Get students to go to Webspiration and brainstorm in their groups of 4 to create a meaningful concept map linking their ideas in Forces and Pressure, with specific reference to daily examples, eg. Lady in high heels vs flats etc.
Teacher is to be invited to their concepts maps so as to track and assess their learning.
Communications
Students to type in their reflections in the Reflection section in Wikispaces on what they have learnt in this lessons. This includes what was useful to them, what problems did they face, what other skills do they think they need to be more competent for such lessons etc.
Invite students from other groups to comment on the group's discussion threads and reflections, in the form of a virtual gallery walk. This helps students to connect more ideas from other groups and also to explore more grounds.